Question: What vein is connected to the small intestine?
Paraphrase: What vein is associated to the little digestive system?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q11090 wdt:P2789 ?X . ?X wdt:P2289 ?answer}
Answer: superior mesenteric vein, superior rectal vein, right gastric vein, right colic vein